Don't show meme Remarkup hint button if Macro application is not usable

Summary: See <https://phabricator.wikimedia.org/T906>. This behavior is a bug; we should remove the button if the user can't use the application.

Test Plan:
- With Macro uninstalled, did these things verifying the button vanished:
  - Sent a user a message.
  - Edited a revision.
  - Edited repository basic information.
  - Edited an initiative.
  - Edited a Harbormaster build step.
  - Added task comments.
  - Edited profile blurb.
  - Edited blog description.
  - Commented on Pholio mock.
  - Uploaded Pholio image.
  - Edited Phortune merchant.
  - Edited Phriction document.
  - Edited Ponder answer.
  - Edited Ponder question.
  - Edited Slowvote poll.
  - Edited a comment.
- Reinstalled Macro and saw button come back.
- Used button to put silly text on a funny picture.

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D10900

src/applications/conpherence/controller/ConpherenceNewController.php

@@ -87,10 +87,11 @@ final class ConpherenceNewController extends ConpherenceController {
         ->setError($e_participants))
       ->appendChild(
         id(new PhabricatorRemarkupControl())
-        ->setName('message')
-        ->setValue($message)
-        ->setLabel(pht('Message'))
-        ->setError($e_message));
+          ->setUser($user)
+          ->setName('message')
+          ->setValue($message)
+          ->setLabel(pht('Message'))
+          ->setError($e_message));
 
     $dialog->appendChild($form);
 

src/applications/differential/customfield/DifferentialRevertPlanField.php

@@ -85,6 +85,7 @@ final class DifferentialRevertPlanField
 
   public function renderEditControl(array $handles) {
     return id(new PhabricatorRemarkupControl())
+      ->setUser($this->getViewer())
       ->setName($this->getFieldKey())
       ->setValue($this->getValue())
       ->setLabel($this->getFieldName());

src/applications/differential/customfield/DifferentialSummaryField.php

@@ -39,6 +39,7 @@ final class DifferentialSummaryField
 
   public function renderEditControl(array $handles) {
     return id(new PhabricatorRemarkupControl())
+      ->setUser($this->getViewer())
       ->setName($this->getFieldKey())
       ->setValue($this->getValue())
       ->setError($this->getFieldError())

src/applications/differential/customfield/DifferentialTestPlanField.php

@@ -53,6 +53,7 @@ final class DifferentialTestPlanField
 
   public function renderEditControl(array $handles) {
     return id(new PhabricatorRemarkupControl())
+      ->setUser($this->getViewer())
       ->setName($this->getFieldKey())
       ->setValue($this->getValue())
       ->setError($this->getFieldError())

src/applications/diffusion/controller/DiffusionRepositoryEditBasicController.php

@@ -120,6 +120,7 @@ final class DiffusionRepositoryEditBasicController
     $form
       ->appendChild(
         id(new PhabricatorRemarkupControl())
+          ->setUser($user)
           ->setName('description')
           ->setLabel(pht('Description'))
           ->setValue($v_desc))

src/applications/fund/controller/FundInitiativeEditController.php

@@ -200,11 +200,13 @@ final class FundInitiativeEditController
           ->setOptions($merchant_options))
       ->appendChild(
         id(new PhabricatorRemarkupControl())
+          ->setUser($viewer)
           ->setName('description')
           ->setLabel(pht('Description'))
           ->setValue($v_desc))
       ->appendChild(
         id(new PhabricatorRemarkupControl())
+          ->setUser($viewer)
           ->setName('risks')
           ->setLabel(pht('Risks/Challenges'))
           ->setValue($v_risk))

src/applications/harbormaster/controller/HarbormasterStepEditController.php

@@ -155,6 +155,7 @@ final class HarbormasterStepEditController extends HarbormasterController {
     $form
       ->appendChild(
         id(new PhabricatorRemarkupControl())
+          ->setUser($viewer)
           ->setName('description')
           ->setLabel(pht('Description'))
           ->setError($e_description)

src/applications/legalpad/controller/LegalpadDocumentEditController.php

@@ -143,20 +143,22 @@ final class LegalpadDocumentEditController extends LegalpadController {
     $form
       ->appendChild(
         id(new PhabricatorRemarkupControl())
-        ->setID('preamble')
-        ->setLabel(pht('Preamble'))
-        ->setValue($v_preamble)
-        ->setName('preamble')
-        ->setCaption(
-          pht('Optional help text for users signing this document.')))
+          ->setUser($user)
+          ->setID('preamble')
+          ->setLabel(pht('Preamble'))
+          ->setValue($v_preamble)
+          ->setName('preamble')
+          ->setCaption(
+            pht('Optional help text for users signing this document.')))
       ->appendChild(
         id(new PhabricatorRemarkupControl())
-        ->setID('document-text')
-        ->setLabel(pht('Document Body'))
-        ->setError($e_text)
-        ->setValue($text)
-        ->setHeight(AphrontFormTextAreaControl::HEIGHT_VERY_TALL)
-        ->setName('text'));
+          ->setUser($user)
+          ->setID('document-text')
+          ->setLabel(pht('Document Body'))
+          ->setError($e_text)
+          ->setValue($text)
+          ->setHeight(AphrontFormTextAreaControl::HEIGHT_VERY_TALL)
+          ->setName('text'));
 
     $policies = id(new PhabricatorPolicyQuery())
       ->setViewer($user)

src/applications/maniphest/controller/ManiphestTaskDetailController.php

@@ -254,6 +254,7 @@ final class ManiphestTaskDetailController extends ManiphestController {
           ->setControlStyle('display: none'))
       ->appendChild(
         id(new PhabricatorRemarkupControl())
+          ->setUser($user)
           ->setLabel(pht('Comments'))
           ->setName('comments')
           ->setValue($draft_text)

src/applications/people/customfield/PhabricatorUserBlurbField.php

@@ -52,6 +52,7 @@ final class PhabricatorUserBlurbField
 
   public function renderEditControl(array $handles) {
     return id(new PhabricatorRemarkupControl())
+      ->setUser($this->getViewer())
       ->setName($this->getFieldKey())
       ->setValue($this->value)
       ->setLabel($this->getFieldName());

src/applications/phame/controller/blog/PhameBlogEditController.php

@@ -122,12 +122,13 @@ final class PhameBlogEditController
         ->setError($e_name))
       ->appendChild(
         id(new PhabricatorRemarkupControl())
-        ->setLabel(pht('Description'))
-        ->setName('description')
-        ->setValue($blog->getDescription())
-        ->setID('blog-description')
-        ->setUser($user)
-        ->setDisableMacros(true))
+          ->setUser($user)
+          ->setLabel(pht('Description'))
+          ->setName('description')
+          ->setValue($blog->getDescription())
+          ->setID('blog-description')
+          ->setUser($user)
+          ->setDisableMacros(true))
       ->appendChild(
         id(new AphrontFormPolicyControl())
           ->setUser($user)

src/applications/pholio/controller/PholioInlineController.php

@@ -157,6 +157,7 @@ final class PholioInlineController extends PholioController {
     $form
       ->appendChild(
         id(new PhabricatorRemarkupControl())
+          ->setUser($viewer)
           ->setName('content')
           ->setLabel(pht('Comment'))
           ->setValue($v_content));

src/applications/pholio/view/PholioUploadedImageView.php

@@ -32,6 +32,7 @@ final class PholioUploadedImageView extends AphrontView {
       ->setLabel(pht('Title'));
 
     $description = id(new PhabricatorRemarkupControl())
+      ->setUser($this->getUser())
       ->setName('description_'.$phid)
       ->setValue($image->getDescription())
       ->setSigil('image-description')

src/applications/phortune/controller/PhortuneMerchantEditController.php

@@ -131,6 +131,7 @@ final class PhortuneMerchantEditController
           ->setError($e_name))
       ->appendChild(
         id(new PhabricatorRemarkupControl())
+          ->setUser($viewer)
           ->setName('desc')
           ->setLabel(pht('Description'))
           ->setValue($v_desc))

src/applications/ponder/controller/PonderAnswerEditController.php

@@ -71,6 +71,7 @@ final class PonderAnswerEditController extends PonderController {
           ->setValue($question->getTitle()))
       ->appendChild(
         id(new PhabricatorRemarkupControl())
+          ->setUser($viewer)
           ->setLabel(pht('Answer'))
           ->setName('content')
           ->setID($answer_content_id)

src/applications/ponder/controller/PonderQuestionEditController.php

@@ -98,6 +98,7 @@ final class PonderQuestionEditController extends PonderController {
           ->setError($e_title))
       ->appendChild(
         id(new PhabricatorRemarkupControl())
+          ->setUser($user)
           ->setName('content')
           ->setID('content')
           ->setValue($v_content)

src/applications/slowvote/controller/PhabricatorSlowvoteEditController.php

@@ -163,6 +163,7 @@ final class PhabricatorSlowvoteEditController
           ->setError($e_question))
       ->appendChild(
         id(new PhabricatorRemarkupControl())
+          ->setUser($user)
           ->setLabel(pht('Description'))
           ->setName('description')
           ->setValue($v_description))

src/applications/transactions/controller/PhabricatorApplicationTransactionCommentEditController.php

@@ -73,6 +73,7 @@ final class PhabricatorApplicationTransactionCommentEditController
         ->setFullWidth(true)
         ->appendChild(
           id(new PhabricatorRemarkupControl())
+          ->setUser($user)
           ->setName('text')
           ->setValue($xaction->getComment()->getContent())));
 

src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldRemarkup.php

@@ -9,6 +9,7 @@ final class PhabricatorStandardCustomFieldRemarkup
 
   public function renderEditControl(array $handles) {
     return id(new PhabricatorRemarkupControl())
+      ->setUser($this->getViewer())
       ->setLabel($this->getFieldName())
       ->setName($this->getFieldKey())
       ->setCaption($this->getCaption())

src/view/form/control/PhabricatorRemarkupControl.php

@@ -22,6 +22,12 @@ final class PhabricatorRemarkupControl extends AphrontFormTextAreaControl {
       $this->setID($id);
     }
 
+    $viewer = $this->getUser();
+    if (!$viewer) {
+      throw new Exception(
+        pht('Call setUser() before rendering a PhabricatorRemarkupControl!'));
+    }
+
     // We need to have this if previews render images, since Ajax can not
     // currently ship JS or CSS.
     require_celerity_resource('lightbox-attachment-css');
@@ -82,7 +88,17 @@ final class PhabricatorRemarkupControl extends AphrontFormTextAreaControl {
       ),
     );
 
-    if (!$this->disableMacro and function_exists('imagettftext')) {
+    $can_use_macros =
+      (!$this->disableMacro) &&
+      (function_exists('imagettftext'));
+
+    if ($can_use_macros) {
+      $can_use_macros = PhabricatorApplication::isClassInstalledForViewer(
+        'PhabricatorMacroApplication',
+        $viewer);
+    }
+
+    if ($can_use_macros) {
       $actions[] = array(
         'spacer' => true,
         );
@@ -184,16 +200,13 @@ final class PhabricatorRemarkupControl extends AphrontFormTextAreaControl {
 
     $monospaced_textareas = null;
     $monospaced_textareas_class = null;
-    $user = $this->getUser();
 
-    if ($user) {
-      $monospaced_textareas = $user
-        ->loadPreferences()
-        ->getPreference(
-          PhabricatorUserPreferences::PREFERENCE_MONOSPACED_TEXTAREAS);
-      if ($monospaced_textareas == 'enabled') {
-        $monospaced_textareas_class = 'PhabricatorMonospaced';
-      }
+    $monospaced_textareas = $viewer
+      ->loadPreferences()
+      ->getPreference(
+        PhabricatorUserPreferences::PREFERENCE_MONOSPACED_TEXTAREAS);
+    if ($monospaced_textareas == 'enabled') {
+      $monospaced_textareas_class = 'PhabricatorMonospaced';
     }
 
     $this->setCustomClass(